Discrepancy Time Expired

What does E3-3 mean?

For an I/O bus module, the configured discrepancy time for a specific channel has expired. This typically occurs in safety applications where redundant signals do not match within the allowed time frame, indicating a potential sensor malfunction, wiring issue, or incorrect time setting. This can lead to safety shutdowns.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check the sensors connected to the channel for proper operation, calibration, and consistency.

2. 4

   Ensure both redundant signal paths are functioning correctly and providing synchronized data.